Experimental and modelling studies on the photocatalytic generation of H2 during water-splitting over commercial TiO2 photocatalyst P25

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989100%3A27710%2F22%3A10251131" target="_blank" >RIV/61989100:27710/22:10251131 - isvavai.cz</a>

Výsledek na webu

<a href="https://www.icct.cz/en/Amca-ICCT/media/content/2022/proceedings/ICCT2022-Proceedings.pdf" target="_blank" >https://www.icct.cz/en/Amca-ICCT/media/content/2022/proceedings/ICCT2022-Proceedings.pdf</a>

DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Experimental and modelling studies on the photocatalytic generation of H2 during water-splitting over commercial TiO2 photocatalyst P25

Popis výsledku v původním jazyce

Poster na konferenci International Conference on Chemical Technology (ICCT), 25.-27.4.2022, Mikulov, Czech republic.Reaching the maximum yield of H2 generation requires loading the optimal concentration of a photocatalyst with a sufficiently large active surface and providing uniformly distributed intensive irradiation. The mass transfer limitations occurred at the beginning of the reaction, which manifested itself as a delay in H2 transfer from TiO2 suspension to the gas phase. The comparison of experimental and theoretical efficiencies showed a reasonable agreement. The theoretical average reaction rate reached a maximum for a photocatalyst concentration of 0.23 g/L, very close to the one observed experimentally (0.25 g/L). Interestingly, the photonic efficiency remains constant beyond this optimal catalyst concentration. The results of this investigation deepen the understanding of mass transfer limitations in the photocatalytic production of gases and their effect on the overall performance of photoreactors.

Název v anglickém jazyce

Experimental and modelling studies on the photocatalytic generation of H2 during water-splitting over commercial TiO2 photocatalyst P25

Popis výsledku anglicky

Poster na konferenci International Conference on Chemical Technology (ICCT), 25.-27.4.2022, Mikulov, Czech republic.Reaching the maximum yield of H2 generation requires loading the optimal concentration of a photocatalyst with a sufficiently large active surface and providing uniformly distributed intensive irradiation. The mass transfer limitations occurred at the beginning of the reaction, which manifested itself as a delay in H2 transfer from TiO2 suspension to the gas phase. The comparison of experimental and theoretical efficiencies showed a reasonable agreement. The theoretical average reaction rate reached a maximum for a photocatalyst concentration of 0.23 g/L, very close to the one observed experimentally (0.25 g/L). Interestingly, the photonic efficiency remains constant beyond this optimal catalyst concentration. The results of this investigation deepen the understanding of mass transfer limitations in the photocatalytic production of gases and their effect on the overall performance of photoreactors.

Druh

O - Ostatní výsledky

CEP obor

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OECD FORD obor

10403 - Physical chemistry

Projekt

<a href="/cs/project/EF16_019%2F0000853" target="_blank" >EF16_019/0000853: Institut environmentálních technologií - excelentní výzkum</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2022

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů